CHIEFLY OF THE UNITED STATES. 141 



GoNiOBASis Albanyensis. pi. 23, fig. 49. 



Testa granulata, conica, subtenui, luteo-olivacea; spira subelevata; suturis irregulariter impressis ; 

 anfractibus instar senis, planulatis, superne interdum plicatis, iuferue striatis ; apertura grandiuscula, 

 ovata, intus albida; labro acuto, vix sinuoso ; columella aliquanto inflecta et contorta. 



Shell granulate, conical, rathei' thin, yellowish olive; spire somewhat raised; 

 sutures irregularly impressed; whorls about six, flattened, sometimes folded above, 

 striate below ; aperture rather large, ovate, whitish within ; outer lip acute, scarcely 

 sinuous ; columella somewhat bent in and twisted. 



Operculum subrotund, light brown, very thin, polar point on the left near the 



middle. 



Proc. Acad. Nat. Soi., 1864, p. 4. 



Hah. — Near Albany and Blue Spring, Baker County, Georgia, Rev. G. White. 



My cabinet and cabinet of Mr. White. 

 Diam. -37, Length -90 inch. 



Remarks. — When I first received this species from Mr. White many years since, I 

 believed it to be a small variety of that proteus species Melcmia [Ooniohasis) Boy- 

 Mniana, (nobis). It differs from it in being less angular on the periphery, in being 

 more granulate, and in having smaller and more closely placed folds on the superior 

 whorls. It is between Boyldniana and viricUstriata. herein described. From the 

 latter it may be easily distinguished by its flatter whorls and more indistinct stria3, 

 •which are about the same in number, but which are usually granulate down to the ' 

 middle of the last whorl. The aperture is about two-thirds the length of the shell. 



Trtpanostoma subrobustum, pi. 23, fig. 50. 



Testa Isevi, pyramidata, tenobroso-cornea, crassa ; spira pyramidata, elevata ; suturis impressis ; anfracti- 

 bus instar novenis, planulatis ; apertura parva, rhomboidea ; labro acuto, valde sinuoso ; columella 

 incrassata et valde contorta. 



Shell smooth, pyramidal, dark horn-color, thick ; spire pyramidal and elevated ; 

 sutures impressed ; whorls about nine, flattened ; aperture small, rhomboidal ; outer 

 lip sharp and very sinuous ; columella thickened and very much twisted. 



Ojjerculum ovate, dark brown, with polar point near the base on the left side. 

 Proc. Acad. Nat. Sci., 1864, p. 4. 



Hah. — Holston River at Knoxville, East Tennessee, Major S. S. Lyon, U. S. E. 



My cabinet. 

 Diam. -61, Length 1-25 inch. 



Remarlcs. — A single specimen only, with an imperfect outer lip and much eroded 

 spire, was received. This is greatly to be regretted, as such a fine large species 

 ought to be well represented. This specimen has no bauds, and is without strias. 



36 



